I've seen people who drive cars with a manual and they often lug the motor, what damage can be done if you lug the motor(f20c) often? how about once in a while, does it damage anything if you do it like once a week accidentally?

thanks in advance.

 

I don't have a technical answer, but it seems that lugging the engine would be hard on the rod bearings. I think that anything below 2500 RPMs in the S2000 would qualify as "lugging".

 

This is certainly not my area of expertise, but I think that if an engine is lugged all the time, oil would not get distributed in a manner sufficient to support the engine during operation, since the oil pump operates off of engine crank rotation.

On a side (but somewhat related) note, what RPM range are most of you operating your S2000 in? I find myself usually in the 2500-3500 RPM range during city driving. Just curious.

 

sorry but what exactly is lugging?

 

Going 30mph in 6th gear is lugging

 

Lugging is running the engine at low rpms and wide throttle.

I think the main risk is overheating. As others note, oil and coolant are not flowing as well at low rpms, but the engine is still working as hard as it can. In the most extreme case, I suppose one could feasibly burn a piston, but that seems unlikely in a modern street car.

Anyway, a few seconds here and there is nothing to worry about, but, say, going up a long hill in too high a gear can cause trouble.

 

Lugging is usually a "high load", as in trying to motivate the car (ie. change it's speed or move its weight up an incline) at a "relatively" low rpm. It's not a good thing because of a combination of several components. Opening up your throttle will cause manifold vacuum to change and the ECU will try to dial in timing/spark advance to get the car going. However because of the low rpm or in a case where you are going up a steep incline (and not necessarily such a low rpm), the engine cannot spin up as quickly as it should. In this circumstance, it could and usually does begin to "knock" or "ping" from the spark firing not quite at the right place in the stroke. The knock sensor takes care of a lot of this but not all. Consequently, both ends of the rods and maybe even a few other moving components take quite a hammering.
(At least that's the way I learned it.)